    //顶点着色器程序
    var VSHADER_SOURCE =
        "void main() {" +
            //设置坐标
        "gl_Position = vec4(0.0, 0.0, 0.0, 1.0); " +
            //设置尺寸
        "gl_PointSize = 10.0; " +
        "} ";

    //片元着色器
    var FSHADER_SOURCE =
        "void main() {" +
            //设置颜色
        "gl_FragColor = vec4(0.5, 0.3, 0.9, 1.0);" +
        "}";
    //获取canvas元素
//    var canvas = document.getElementById('canvas');
//    //获取绘制二维上下文
//    var gl = canvas.getContext('webgl');
//    if (!gl) {
//        console.log("Failed");
//        return;
//    }
    //编译着色器
    var vertShader = gl.createShader(gl.VERTEX_SHADER);
    gl.shaderSource(vertShader, VSHADER_SOURCE);
    gl.compileShader(vertShader);

    var fragShader = gl.createShader(gl.FRAGMENT_SHADER);
    gl.shaderSource(fragShader, FSHADER_SOURCE);
    gl.compileShader(fragShader);
    //合并程序
    var shaderProgram = gl.createProgram();
    gl.attachShader(shaderProgram, vertShader);
    gl.attachShader(shaderProgram, fragShader);
    gl.linkProgram(shaderProgram);
    gl.useProgram(shaderProgram);

    //绘制一个点
    gl.drawArrays(gl.POINTS, 0, 1);

    android.logd("JS-CALL","aaa宣传中小城镇 sdk:" + android.version_sdk + "  release:" + android.version_release);